Abstract
Micrometer-sized bubbles are formed in the water suspension with absorptive pigment particles due to local heating. The heating is performed by moderately focused CW nearinfrared laser radiation with controllable power. Depending on the laser power, regimes of the bubble generation, stable growth of the existing bubbles, stationary bubbles and their shrinkage and collapse are realized. The physical pattern is interpreted based on the temperature conditions in the suspension. We show the possibilities for generation of single bubbles as well as groups of bubbles with controllable sizes and numbers. The bubbles form quasi-ordered structures within the laser-illuminated region. They can be transported together with the focal spot. The results are useful for applications associated with the precise manipulation in nano- and micro-engineering problems.
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